No-Spill, No Leaks, No Mess: no spill bite resistant spout with Vari-Flo valve allows child to control the flow rate and drink at their own pace. The Vari-Flo valve opens only when your child sips, letting them control the flow rate while preventing leaks and spills. Insulated Base: keep liquid cool for longer enjoyment and is sweat proof! The insulated design also helps prevent a “sweating” cup that may damage furniture Durable Bite Proof Spout: hard spout’s bite-proof design holds up to chomp-happy drinkers. 2 Pack with Fun Prints: each 2 pack comes in fun prints that your little one will love. Parents will love always having and extra cup ready for their little one(s). Fun Patterns and Colors: The varied cup designs and colors will delight your little one as they sip Nuby uses materials with your child’s health in mind. These cups are intended for children aged 6 months and older. Colors/ Prints May Vary: Green/Blue, Pink/Purple, Yellow/Aqua